Bhagwad Gita
Chapter 2, Verse 60
यततो ह्यपि कौन्तेय पुरुषस्य विपश्चितः।
इन्द्रियाणि प्रमाथीनि हरन्ति प्रसभं मनः।।2.60।।
The senses are so strong and impetuous, O Arjuna, that they forcibly carry away the mind even of a man of discrimination who is endeavoring to control them.